INA139NA/3K TI Current Regulation/Management

The INA139NA/3K is a high-side, unipolar current shunt monitor from Texas Instruments that converts a differential shunt voltage into a current output, which then develops a ground-referenced voltage across an external load resistor (RL). For selection, verify the common-mode and supply voltage (V+) range of 2.7V to 40V is compatible, and ensure the differential input (VIN+ - VIN-) does not exceed 2V. The gain is adjustable by selecting RL (with bandwidth decreasing as RL increases). Key specifications include a ±0.5% accuracy over the -40°C to 125°C temperature range, a typical quiescent current of just 60µA, and a 440kHz bandwidth. The device is housed in a 5-pin SOT-23 package. Ideal for battery current monitoring, power management in portable devices, overcurrent protection in industrial systems, automotive load sensing, and general high-side current measurement where low power consumption is critical. In stock at HL Electronics – request a quote for fast delivery.